Been speaking to a couple of the UK guys about oil filters for these machines. The normal source of supply over here appears to have dried up in the last six months and the back order for new stock shows no sign of coming through.

I cant remember exactly, but they fit some form of FIAT commercial applications.

To get round this we have started making replacement bolts, so that we can fit a Honda filter off a CB900F, using a spacer. These seem to be working well and they are 25% of the price of the NOS Ducati filters!